Dynamic Indirect light cache #68463

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Clément Foucault · 2019-08-09T15:58:12+02:00

Clément Foucault commented

2019-08-09 15:58:12 +02:00

The idea would be to have a multiple level cache that stores a voxelized version of the scene to render the irradiance points.

Each voxel would be linked to a set of surfel (surface elements) that stores color and normal of the surface.
Each time the lights in the scene changes, the voxelized version is updated and propagates the change to the irradiance points.

This means having a list of surfel per voxel (say 6, 8) and a list of voxel per irradiance points.
This would be a mix of The Division dynamic indirect lighting [link]] and Mc Guire raytraced irradiance probes [http:*jcgt.org/published/0008/02/01/|link.
This feature might be limited to hardware that supports compute shaders.
This is not a trivial feature and needs a lot of R&D.

Estimate : 4 weeks

The idea would be to have a multiple level cache that stores a voxelized version of the scene to render the irradiance points. Each voxel would be linked to a set of surfel (surface elements) that stores color and normal of the surface. Each time the lights in the scene changes, the voxelized version is updated and propagates the change to the irradiance points. This means having a list of surfel per voxel (say 6, 8) and a list of voxel per irradiance points. This would be a mix of The Division dynamic indirect lighting [link]] and Mc Guire raytraced irradiance probes [[http:*jcgt.org/published/0008/02/01/|link](https:*www.gdcvault.com/play/1023273/Global-Illumination-in-Tom-Clancy). This feature might be limited to hardware that supports compute shaders. This is not a trivial feature and needs a lot of R&D. Estimate : 4 weeks

Clément Foucault commented

2019-08-09 15:58:12 +02:00

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2019-08-09 19:33:01 +02:00

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2019-08-14 15:34:34 +02:00

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2019-09-22 17:29:30 +02:00

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noki paike commented

2019-09-22 17:29:30 +02:00

This feature might be limited to hardware that supports compute shaders.

not only..
Intel starts to work its way up with raytracing in its CPUs...

https://blenderartists.org/t/intel-jump-on-the-real-time-ray-tracing-train/1181697

> This feature might be limited to hardware that supports compute shaders. not only.. Intel starts to work its way up with raytracing in its CPUs... https://blenderartists.org/t/intel-jump-on-the-real-time-ray-tracing-train/1181697

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2019-10-28 22:18:37 +01:00

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Büke Beyond commented

2021-01-19 20:31:33 +01:00

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Büke Beyond commented

2021-01-19 20:31:33 +01:00

"Estimate : 4 weeks" you are fast! Can't we get a gofundme for you or something? :-)

Eevee is an excellent middle ground between Cycles, and games engines (that look still, well, like game engines). At 50 times the speed of Cycles, there is a lot of room to make Eevee usable for film quality, cone GI, scattered DoF, adaptive tessellation, automated, decimated LODs at a distance. All of these would be game changers for Blender and the industry.

"Estimate : 4 weeks" you are fast! Can't we get a gofundme for you or something? :-) Eevee is an excellent middle ground between Cycles, and games engines (that look still, well, like game engines). At 50 times the speed of Cycles, there is a lot of room to make Eevee usable for film quality, cone GI, scattered DoF, adaptive tessellation, automated, decimated LODs at a distance. All of these would be game changers for Blender and the industry.

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2021-05-27 10:13:15 +02:00

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Zijun Zhou commented

2021-05-28 03:27:28 +02:00

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Zijun Zhou commented

2021-05-28 03:27:28 +02:00

This comment was removed by @Eary

*This comment was removed by @Eary*

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Dalai Felinto commented

2021-05-28 14:36:26 +02:00

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Dalai Felinto commented

2021-05-28 14:36:26 +02:00

Hi @Eary please don't post any content that is not open source or that you don't own the rights yourself. I'll delete your post for now but feel free to re-post your thoughts if you can elaborate looking at Blender only.

Zijun Zhou commented

2021-05-28 20:50:30 +02:00

In #68463#1167740, @dfelinto wrote:
Hi @Eary please don't post any content that is not open source or that you don't own the rights yourself. I'll delete your post for now but feel free to re-post your thoughts if you can elaborate looking at Blender only.

Ok I am going to replace those content with regional screenshots of the light pattern and typed text for those names of the source files

So what I originally posted was a screen cap video of a certain early access source-available software, but since I cannot post it here, I would replace it with this:

This looks very familiar to Eevee's baking pattern, and thus I think there might be some similarities between that realtime GI system and this "Dynamic Indirect Light Cache" project. I am more certained about that after reading these few words from the certain source-available software's source codes:

VoxelLighting

Software Tracing Mode

It seems kind of similar to the description of this page:

to have a multiple level cache that stores a voxelized version of the scene to render the irradiance points

Mc Guire raytraced irradiance probes.

This gives me more hope and I am very looking forward to Eevee with this Dynamic Indirect Light Cache done, because I think it is in the right direction. I originally thought this could be a reverence for the devs in development of this Eevee project, but it seems like it is not even appropriate to mention its name here.

Is this ok now? I removed all contents that was directly signaling that software. . I think it should be fine. About the screenshot, I surely don't own the software but I own the art that I made with it, so I think it should also be fine.

> In #68463#1167740, @dfelinto wrote: > Hi @Eary please don't post any content that is not open source or that you don't own the rights yourself. I'll delete your post for now but feel free to re-post your thoughts if you can elaborate looking at Blender only. Ok I am going to replace those content with regional screenshots of the light pattern and typed text for those names of the source files So what I originally posted was a screen cap video of a certain early access source-available software, but since I cannot post it here, I would replace it with this: ![image.png](https://archive.blender.org/developer/F10146871/image.png) ![image.png](https://archive.blender.org/developer/F10146880/image.png) This looks very familiar to Eevee's baking pattern, and thus I think there might be some similarities between that realtime GI system and this "Dynamic Indirect Light Cache" project. I am more certained about that after reading these few words from the certain source-available software's source codes: >VoxelLighting >Software Tracing Mode It seems kind of similar to the description of this page: > to have a multiple level cache that stores a voxelized version of the scene to render the irradiance points > Mc Guire raytraced irradiance probes. This gives me more hope and I am very looking forward to Eevee with this Dynamic Indirect Light Cache done, because I think it is in the right direction. I originally thought this could be a reverence for the devs in development of this Eevee project, but it seems like it is not even appropriate to mention its name here. Is this ok now? I removed all contents that was directly signaling that software. . I think it should be fine. About the screenshot, I surely don't own the software but I own the art that I made with it, so I think it should also be fine.

Clément Foucault commented

2021-05-28 22:39:20 +02:00

@Eary The company behind this "certain early access source-available software" is going to share more detail about their implementation at Siggraph which should be public resources. They already have done this in the past and EEVEE is already partially based on their publications in the field of Realtime Compute Graphics.

Zijun Zhou commented

2021-05-29 02:43:30 +02:00

Oh good to know, thanks

Tomasz Sadzinica commented

2021-06-08 16:10:08 +02:00

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Basil commented

2021-07-26 05:02:34 +02:00

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Dynamic Indirect light cache #68463